Fix Antenna Violation in Manufacturability (#24)

Author: WilliamZhang20

src/config.json

@@ -23,6 +23,10 @@
   "PL_RESIZER_HOLD_SLACK_MARGIN": 0.5,
   "GRT_RESIZER_HOLD_SLACK_MARGIN": 0.4,
 
+  "//": "Enable antenna diode insertion for fixing antenna ratio violations",
+  "DIODE_INSERTION_STRATEGY": 4,
+  "ANTENNA_DIODE_CELL": "sky130_fd_sc_hd__diode_2",
+
   "//": "RUN_LINTER, LINTER_INCLUDE_PDK_MODELS - Disabling the linter is not recommended!",
   "RUN_LINTER": 1,
   "LINTER_INCLUDE_PDK_MODELS": 1,
@@ -72,4 +76,4 @@
 
   "//": "Only export pin area in LEF (without any connected nets)",
   "MAGIC_WRITE_LEF_PINONLY": 1
-}
+}